Duplex register calculating machine



Oct. 20, 1953 G. c. ELLERBECK 5 ,1

DUPLEX REGISTER CALCULATING MACHINE Filed Jan. 30, 1950 6 Sheets-Sheet l IN VEN TOR. GRANT C. ELLERBECK ATTORNEY Oct. 20, 1953 G. c. ELLERBECK DUPLEX REGISTER CALCULATING MACHINE 6 Sheets-Sheet 2 Filed Jan. 30, 1950 INVENTOR. GRANT C. ELLERBECK ATTORNEY Oct. 20, 1953 G. c. ELLERBECK DUPLEX REGISTER CALCULATING MACHINE 6 Sheets-Sheet 3 Filed Jan. 30, 1950 IN VENTOR. GRANT C. ELLEREECK Arromvs/ Oct. 20, 1953 G. c. ELLERBECK DUPLEX REGISTER CALCULATING MACHINE 6 Sheets-Sheet 4 Filed Jan. 30, 1950 INVENTO GRANT c. ELLERBECK ATTOR Y Oct. 20, 1953 G. c. ELLERBECK 2,656,104

DUPLEX REGISTER CALCULATING MACHINE Filed Jan. 30, 1950 6 Sheets-Sheet 5 o M r (0 Q J o 1' l fi e 2: x 3'- N N V e mvmron g 3 GRANT c ELLERBECK N ATTORNEY Oct. 20, 1953 G. c. ELLERBECK 2,656,104

DUPLEX REGISTER CALCULATING MACHINE Filed Jan. 30, 1950 6 Sheets-Sheet 6 FIE-E INVHVTOR. GRANT C. ELLERBECK A TTORNE Y Patented Oct. 20, 1953 DUPLEX REGISTER CALCULATING MACHINE Grant 0. Ellerbeck, San Leandro, Califi, assignor to Friden Calculating Machine Co., Inc., a corporation of California Application January 30, 1950, Serial No. 141,223

12 Claims.

The present invention relates to calculating machines and has as its general object the provision of a mechanism by means of which the counter of a rotary type calculating machine can be selectively used as a grand totalizer.

It is a primary object of my invention to provide an improved form of duplex accumulators in which the normal counter can be used selectively as a grand totalizer, the counting mechanism being rendered inoperative during such operation.

Another important object of the invention is to provide a mechanism by means of which a counter register utilizing a planetary, or crawl type, tens-transfer, can be connected to the accumulator register, whereby both the counter and the accumulator can be operated from the actuator in unison to in effect, provide a machine with two accumulators, either one of which can be cleared from time to time while maintaining grand totals to be accumulated in the other.

Another important object of my invention is to provide a mechanism which is selectively settable to render the counter and register of the type best shown and described in the patent to Avery, No. 2,211,736, into a duplex accumulator calculating machine.

These and other important objects of my invention will be readily understood from the description and claims which follow. A preferred form of my invention is shown in the accompanying drawings in which:

Fig. 1 is a cross-sectional view of the carriage of a calculator of the typ shown in said patent, taken on a plane to the right of the first order of the register and showing the mechanism of my invention, as well as the accumulator drive, in a disengaged position.

Fig. 2 is also a cross-sectional view of the carriage, but is taken on a plane to the right of one of the intermediate orders of the register (such as the plane indicated by the line 2-2 of Fig. and shows the dipping carriage dipped to engage the actuator with the accumulator, but with the connecting mechanism of my invention in a disengaged, or normal, position.

Fig. 3 is similar to Fig. 2 but shows the connecting mechanism of my invention in operative position to actuate the counter register from the actuator in unison with the accumulator register.

Fig. 4 is a left-end view of the calculator carriage, with cover and all other parts removed which are not necessary to an understanding of my invention.

Fig. 5 is a plan view of the mechanism of my invention.

Fig. 6 is a front view of two orders of the accumulator register showing the preferred type of planetary or crawl, tens transfer.

A preferred utilization of myinvention is to convert the calculator of the above-mentioned patent into a truly duplex accumulator machine, in which the normal counting mechanism' can be rendered inoperative and the counter register used as a grand totalizer. For purposes of simplification the machine of that patent is not described in detail as most of the parts of the machine are not concerned with the operation of my invention: In order to render my invention more readily apparent to those familiar with the machine of said patent, I have used the same reference characters as used in the patent. when the parts are the same as shown in thepatent. However, when the parts have been slightly modified this fact is shown by adding another digit to the reference character used in the patent, e. g., the shaft 262 of the patent is changed to 2620 as I prefer that the shaft be splined, as shown, instead of cylindrical as in the patent. The new parts added by my invention are shown by reference characters ranging between 2000 and 2100.

Values are entered into the register by means of a gear I89 (Figs. 1 to 3, inclusive) which is keyed to a collar I69 rotatably mounted on the shaft H0. The amount of rotation of the gear 189 is determined by the position of selection plates, such as I12, which serve to connect the gear I89 through one of a number of gear trains with a predetermined drive shaft, not shown herein but fully shown and described in said patent.

The accumulator and the counter mechanisms are mounted in a carriage which is shiftable transversely across the machine. The carriage frame comprises end plates 25I (Fig. 4) rigidly connected by a stop plate, not shown, and the various cross shafts some of which will be hereafter mentioned. The carriage is shiftable on the carriage track shafts 259 and 260. Mounted at even intervals between the end plates 251 are a series of carriage brace plates 255 (Figs. 1', 2 and 3) which are locked to the stop plate, not shown. Locked spacing combs 263 extend through spaced slots in each brace plate, holding them in rigid spaced relationship. A cross shaft 2020 is mounted in the front end of the brace plates 255,, and supports the front end of the clipping carriage. The dipping carriage comprises the plates 266 pivotally mounted on shaft 2620, which plates are locked in rigid relationship by means of a comb 261 and a commondipping bail 269. Normally the dipping carriage is in the raised position shown in Fig. 1. At the beginning of a cycle of digitation the dipping carriage is lowered by means of the bail 269 into the position shown in Figs. 2 and 3 in which the gearing of the accumulator mechanism engages the actuator gears [89, as shown in these figures.

The dipping of the clipping carriage is controlled, as shown in Fig. 4, by means of a link 56% which is provided with a pair of rollers 568 embracing the common bail 259. The link 569 is mounted on a suitable pin 591. Movement of the link 596 is controlled by means of a lever 60! the bifurcated end of which embraces pin 992 on the link 596, all as explained in the aforementioned patent.

The various ordinal units of the accumulator are mounted on a common shaft 210 carried by the various plates 296 of the dipping carriage. In each order the accumulator mechanism includes a drive gear 213 rotatably mounted on a collar 293 supported by the shaft 210. This gear in turn is driven by an idler gear 21! rotatably mounted on shaft 212, also supported in the dipping carriage, the idler gear meshing with the actuator gear I89 when the carriage is in the dipped position. Associated with the accumulator mechanism is a suitable detent 3l9 in each order suitably mounted on shaft 320, likewise journalled in the dipping carriage. Normally, the nose of the detent engages the teeth of the idler gear 21!, but as the carriage is dipped for digitation, the lower arm of the detent engages the cross shaft 535 to rock the detent clockwise and thus disengage it from the idler gear. The detent is normally pulled in a counter-clockwise direction by a suitable spring 3l10.

It will be understood, of course, that the accumulator mechanism includes the customary dials and a suitable tens-carry mechanism preferably of the type shown and described in said patent, and shown in part in Fig. 6 hereof. Although such elements are not a part of my invention, a suitable tens carry mechanism is necessary to the proper operation of my invention and will therefore be briefly described. Two units, or orders, of the preferred form of register are shown in Fig. 6. It is preferred that the accumulators and the counters be identical and that they utilize the same preferred type of tens-transfer mechanism. Therefore, one order only of the accumulator will be described, but it will be understood that the counter is substantially the same.

It will be noted in Fig. 6 that each ordinal unit comprises a spider 214 which is rigidly secured to a sleeve 215 on shaft 210. This spider 214 carries an internal ring gear 216. One of the arms of the spider carries an angular extension 218, which extends slightly beyond the right side face of a thin shell 219 fixed to the spider 214 and serves as a zero stop in resetting operations. The periphery of the shell 219 is sufficiently wide to accommodate the digits ranging from to 9 arranged as shown.

Integral with the sleeve 215 on shaft 219 is a sun gear 280 abutting one of the brace plates 266 and interposed between said sun gear 289 and the spider 214 is a snail cam 28! and spacer 282. A projection 283 from the spider extends into an enlarged slot, not shown, in the cam to permit limited movement of said cam with respect to the spider.

Located immediately to the right of the mechanism just described is a plate 292 fixed to a spur gear 213 which is driven by the actuator gear I89 through an intermediate or idler gear 211 when the plates 269 are dipped. These elements are rotatably mounted on a sleeve 293 which in turn is rotatably mounted on a sleeve 294. Plate 292 is in turn fixed to a plate 299 by studs 29'. provided at each end of said plate, and on each of said studs is mounted a planet gear 298 meshing with the ring gear 216 carried by spider 214 and with another sun gear 299 formed integrally with sleeve 293. Thus, the spur gear 213, the plate 292, the planet gears 298, and the ring gear 216 constitute a planetary assembly which rotates about the sun gear 299 and comprises the means by which the numeral bearing shell 219 can be rotated by the actuating mechanism of the machine which drives the gear 21! as hereinbefore described.

Means are provided for driving the spider 214 and its associated dial shell 219 by means of the spider 214 of the next lower order independently of any movement of gear 213. This means includes a spider 399 secured to the right end of the above-mentioned sun gear sleeve 293 which spider carries an internal gear 30l. Sleeve 294 which, as previously described, supports the sleeve 293 on shaft 210 is provided with a double arm member 304, one arm 306 of which supports a stub shaft 391 to which are fixed planet gears 398 and 309. The planet gear 308 meshes with the internal gear 30! on spider 300 while the planet gear 399 meshes with the sun gear 289 of the adjacent lower order. Sleeve 294 also includes an integral spacer 310 so that the gear 399 is positioned in alignment with the ring gear 39! and does not abut the spider 300.

The member 394 is rocked, as is fully described in the above-mentioned patent, by a lever, not shown, which is positioned by a lever 315 which carries roller 3'9 in the same plane as the snail cam 28! of the next lower order. This construction permits the amount of movement of the dial 219 imparted to it by tens-carry from the next lower order to be backed off by the snail cam, as fully described in said patent.

For the present invention it suffices to point out that in operation the gear 213 is driven by the actuating mechanism and revolves planetary gears 299 about shaft 219 as a center. Whenever a given amount is thus entered in any one unit of the accumulator, member 304 being held in fixed position, one-tenth of that amount will be entered in the next higher unit by means of the carrying mechanism comprising sun gear 280 fixed to spider 214 and driving planetary gears 308 and 309. These in turn drive integral gear 30! fixed to sleeve 293 of the next higher unit in a direction opposite to that of spider 214 and, by rotating said sleeve, drives sun gear 299 integral therewith. If gear 213 and studs 291 are stationary, the movement of sun gear rotates ring gear 215 in the direction opposite to that of gear 299 and therefore in the same direction as that of the lower order dial transmitting the carrying. If gear 213 is moving to introduce digitation as previously described, ring gear 215 will move by an amount equal to the resultant of that produced by the rotation of both gear 299 and gear 213. Thus, the movement of any higher order dial becomes the resultant of the digitation entry into its own order and the carry movement from the next lower order, as is more fully described in said patent.

In some machines of this type the counter extends over approximately half of the carriage, but it is preferred that the counter or counters, extend the full width of the carriage in my invention, as is shown in the patent above referred to. It is immaterial whether the counter is a single counter extending the full length of the carriage or whether it is the duplex counter described in said patent. In either event the operation of my invention will be the same. The counter register comprises a plurality of dials,

accumulating operation, the two registers are not connected except during digitation, and either register can be cleared without effecting the other. However, when the dipping carriage lowered to engage the idler gear 21I with the actuator gear I89, the interposable gear 2999 is rocked into engagement with the counter gear I819 so that (assuming that the counter actuator is rendered inoperative) the counter gear I319 will rotate in unison with the accumulator gear 213. Thus, values transmitted from the actuator gear I89 are entered simultaneously into the accumulator and the counter, through the gears 213 and I819, respectively.

It might be mentioned at this point that the rocking of the interposable gear 2690 into engagement with the counter gear i819 will normally cause that gear to rotate slightly to momentarily give an incorrect reading of the counter register. However, in high-speed machines of the type described, the dials are normally rocked at the beginning of digitation through the release of the partial value blockout of the crawl tenstransfer mechanism, and are immediately fol lowed by rotation resulting from digitation, so that this slight movement of counter gear I810 is not objectionable. It will be understood, further, that upon disengagement of the interposable gear 2000 from the counter gear i819, which occurs at the end of each cycle of registration as the dipping carriage is always raised at the end of such a cycle of digitation, the gear I819 will be moved in a reverse direction by an equal amount, so that the accuracy of movement of the counter is not effected.

It is necessary, when the interposable gear 200i! is engaged with counter gear I819, to disengage the gear detents I932 from the gears i811, order to permit the train of gears normally connected to gears I819 to rotate freely. A variety of means can be used to move the detents I932 to disengaged position, but I prefer to use the mechanism shown in the drawings. This mechanism comprises forming the detents i932, of which there is one for each order of the counter, with a tail I9320. This tail is engaged by a gate 2040, when the control lever 2020 is moved to the operative or accumulate position, by the lowering of the dipping carriage bail 269. The gate 2040 is mounted on a pair of bellcrank arms 294! which are pinned to a shaft 2042 rotatably and longitudinally movable in the side plates 2643 of the machine (Fig. 4). The lower arms of the bellcranks 20M support a roller 2044 which is positioned immediately below the bail 269. Thus, the clipping of the carriage rocks the bellcranks 204! (in a counter-clockwise direction in Fig. l, or clockwise in Fig. 4) whereupon the gate 2940, if the machine is positioned for entry of values from the actuator into the counter register, depresses the tail 59320 of the detents I932, thereupon releasing the gears I311 for free rotation.

In view of the fact that the engagement and disengagement of the interposable gear 2000 with the counter gear I819 causes slight rotation of the latter, it is preferred that the gate 2040 be latched in its lowermost or operative position until the instant the interposable gear 2000 completely disengages the counter gear I819. This can be secured by a number of means, but a simple and preferred form is shown in Fig. 3. This latch comprises a latching arm 2050 suitably pinned to the machine frame by any suitable means such as pin 2053. and normally urged in a counter-clockwise direction by a spring 2054 tensioned between a stud 2055 on the lever 2050 and a stud 2056 on the machine frame. The upper end of the latch lever 2050 is provided with a shoulder 205i adapted to engage a stud 2052 mounted on one of the bellcranks 204i. Upon counter-clockwise rotation of the bellcranks 204i the latching lever 2050 is rocked first clockwise against the tension of its spring 2054 until the pin 2052 has slipped by the shoulder 205l, whereupon the lever is pulled counter-clockwise to latch the bellcranks and their associated gate 2040 in a depressed position.

The lever 2050 is also provided with a projecting shoulder 2051 adapted to be cammed to disengaging position by the last portion of the rise of the dipping bail 269. The shoulder 2051 is formed so that the dipping bail 269 rocks the lever 2050 to disengage its shoulder from the pin I052 on the instant the interposable gear 2000 becomes disengaged from the counter gear I819. This permits the counter rotation of the counter gear I819 caused by the disengagement of the idler gear 2000 to take place freely at the end of digitation. The form of latch shown provides a quick operating latch to disable the detent I932 as the interposable gear engages counter gear [819, but provides late unlatching when the carriage is raised.

It is necessary that the detents I932 be uneffected by the rocking of the bellcranks 20 in normal operation, but that they all be operated by the gate 2040 when the mechanism is set for accumulation of values in the counter register. This can be secured by several means, but a preferred form is shown in Figs. 4 and 5. As

shown in Fig. 5, it is preferred that the gate 2040 be provided with slots 2045 in the lower edge, one positioned adjacent each detent. When the mechanism is positioned for normal operation, in which the counter operates independently of the register, the slot will be positioned as shown in Fig. 5, so that the tails 19320 of the detents will pass through the gate 2040 freely. However, if the shaft 2042 is shifted longitudinally of the carriage, the gate 2040 is likewise shifted, and thereupon the tails I9320 of the detents are engaged by the rocking of the gate 2040.

I propose to shift the shaft 2040 simultaneously with the positioning of the rocker arm 2002 by means of the lever 2020, as is best shown in Fig. 4. Preferably, the left end of the shaft 2042 is provided with a peripheral slot 2050 which embraces the cam end 206i of lever 2062 which is keyed to spline shaft 2064. The shaft 2064 is rotatably mounted in the carriage end plates 205 I, and the lever 2062 is adapted to slide therealong. It will be recalled that the shaft 2042 is mounted in the frame of the machine and the lever 2062 therefore always will be held adjacent the machine frame or side plate 2043, as shown in Fig. 5. However, the control lever 2020 is preferably mounted on the end plate 25l of the carriage, and it is desirable to rock the shaft 2064 from motion of that lever. This can easily be secured by means of a crank arm 2065 mounted at the left end of shaft 2064. A link 2066 is pinned at one end to the control lever 2020, as by means of pin 2022, and at the other end to the crank arm 2065 as by means of pin 2061. Thus, when the control lever 2020 is rocked to its rearward position, counter-clockwise of the position shown in Fig. 4, the arms 20H are not only rocked to the position shown in Fig. 3, but the lever 2062 is rocked clockwise.

fmockwise rocking of lever 2082 causes the cam- -ming arm "206i, which is embraced by the slot 20", topu'llthe shaft 2042 to the right in Fig. 5. This positions the gate 2040 so that the tails WQHOofthedetents 1532 are engagedby the gate 2040 as it is rocked by the dipping of the carr'i'age.

When the gate 2048 is shifted to the right, as

heretofore described, an car 2010' (see particu- *uarly Figs. 1 and 5') formed on "the extreme right end thereof moves in "front of the nose 18240 of the counter actuator i824. ear 20 1i locks forward motion of the actuator *fllfl and prevents the nose 18240 from coming Thus, the

into engagement with the counter gear i880.

*Such rocking is possible under my construction "the slot 182 which forms the connection be tween :the counter actuator 1821' and the-counter actuator I 830 forms ayielding connection which permits the counter actuator lever 830 to move through its normal path without moving the counter actuator I824. It will be recalled that the spring 2015, under normal conditions is sufaflciently strong 'to cause the actuator I824 to "movewiththe actuator lever l-83llto efiect countin'g in-the normal manner.

I claim:

1. :In a calculating machine having accumulator wheels. :a driving gear for each of said "accumulator wheels, actuators for said driving :ge'arsime'ans for engaging said driving gears and said actuators preliminary to digitation and for 'disengagingthesam'e subsequent thereto, counter wheels, a driving gear ioreac'h'of said counter wheels, and an actuator "for said counter wheel driving gears: the combination which comprises interposable gears engaging said accumulator wheel driving gears and normally disengaged :from said counter wheel driving gears, means for rendering :said counter actuator inoperative to move said counter wheels-anda manually operated control :means operative to position said interposable gears so they engage said counter wheel driving gears upon engagement of said accumulator driving wheels with-their respective I actuators and-to render inoperative said counter actuator.

2. In a calculating machine having accumulator wheels, a drivinggear for driving eachof said accumulator wheels, crawl tens-transfer de- 7 vices between said accumulator wheels, actuating ,gears for difierentially rotating said accumulator wheel driving gears, means for 'operatively-engaging said accumulator wheel drivingg'ears with said actuator gearspreliminary to digitation and for disconnecting the same subsequent'to digitation, counting wheels, a gear fordriving eachoi said counting'wheels, crawl tens transfer devices between said counting wheels, and a counter actuator: the combination which comprises a ,pivotally mounted lever associated with each accumulator wheel,.an interposable gear mounted on each said lever engaging the accumulator position said levers to cause said interposable gears to engage said counter-Wheel driving gears and to simultaneously render said counter actuator inoperative with respect to said counter gear-3,.

10 3'. In a calculating machine having a irame, a carriage shiftable laterally on said frame, an

ordina'lly arranged accumulator register in said carriage, actuating means for said accumulator register mountedon said frame, means for rocking the carriage to engage said accumulator register with the actuating meansprior to digitation and to rock it out of such engagement subsequent to digitation, an ordinally arranged Cdllhtr register in Said carriage, an counter operating means mounted on said frame for operatingsaid counter register the combination which comprises positionable means for operatively connecting each order of the said counter register to the corresponding order of said acacumulator register, means for positioning :Csaid positionable means in connecting relationship to said register throughout the period of engagement of the accumulator register and the actuating means, and means operativesimultaneously with said positioning means for rendering said counter operating means inoperative to move said counter register.

4. In a calculating machine having arr-ordinally arranged accumulator register, actuating means for said accumulator register, means -101- rocking the accumulator register into -enga gement with the actuting means ,prior'to digitation and to rock-itout of such engagement subsequent to :digitation, an ordinally arranged counter, and

counting zmeans for'operating said counter; the

combination which comprises normally ixmperative gearingpositionable to connect each order of :the said counter :to the corresponding order of said accumulator register, means :for positioning such gearing, means for holding saidgearing in connecting position throughout the period during which the accumulator register is rocked. into engagement with said actuating means, and

means operative simultaneously with said-gearing positioning means for rendering said counting means inoperative to move said counter.

5. ,In a calculating machine having a frame, a 1 carriage *shiftable laterally on said frame, an

:ordinally arranged accumulator register jmounted in said I carriage, actuating gears mountedon said frame :for driving said accumulator register,

means for rocking the carriage to engage the accumulator "register with the actuating igears prior to digitation andto restore the carriageto its disengaged position subsequent to i digitation,

an ordinally arranged counter register in said carriage, andicounting-means mounted on said frame for operating said counter register; the combination which comprises interposable gearingbetween said accumulator register andsaicl counter register, said :gearing having a normal disconnecting position and a connectin position with respect to said registers, manually operated :means for determining the position of said interposable gearing, means controlled ibyzsaid manual-ly operated means for disabling .said counting means when said .interposable gearing is in connecting position, and holding means -e fective to retain said ,interposable gearing ,in either I adjusted position while thecarriage. is in --its' rockedposition.

.6, In-.aficalculating machine havin an ordinally arranged accumulator register, a' crawl type tens 'transfer device between the various orderspof the accumulator register, anactuator forsaidaccumulator register, an. ordinallyarranged counter register; the corresponding orders-.ofsaid registers being inthe 1 same planes, tcountin'g :means for said counter register, and acrawl type tenstransfer device between the various orders of the counter register: the combination which comprises a normally disengaged connecting gearing for driving said counter register from said actuator, means for rendering said counting means inoperative to move said counter register, a manually operated control means operative to position said normally disengaged connecting gearing into engaging position and to operate said means for rendering said counting means inoperative, and means for retaining said connecting gearing in engaging position throughout operation of said accumulator actuator.

'7. In a calculating machine having accumulator gears, actuatin means for said accumulator gears, counter gears, a counter actuating means for said counter gears, means for engaging said accumulator gears and said actuating means preliminary to digitation and for disengaging the same subsequent thereto: the combination which comprises interposable gears for selectively connectingsaid counter gears to said accumulator gears, means for rendering said counter actuating means inoperative to move said counter gears, a manually positionable mem-- her, and means jointly under the control of said member and said means for engaging said acmulator gears and said actuating means for positioning said interposable gears to connect said counter gears and said accumulator gears and to operate said means for rendering said counter actuating means inoperative.

8. In a calculating machine having accumu- -lator dials, tens-transfer devices between said accumulator dials, actuating means for said accumulator dials, engaging means operable to operatively connect said dials with said actuating means preliminary to digitation and for disengaging the same subsequent thereto, counter dials, tens-transfer devices between said counter dials, and counter operating means for said counter dials: the combination which comprises interposable gears positionable to connect said counter dials to said actuating means, means operable by said engaging means for positioning said interposable gears in connecting relationship, and control means for selectively conditioning said interposable gears to be positioned in connecting relationship by operation of said engaging means to engaging position and. to be positioned in disconnecting relationship by the subsequent disengagement of said engaging means and for rendering said counter operating means inoperative to move said counter dials.

9. In a calculating machine having accumulator wheels, crawl type tens-transfer devices between said accumulator wheels, actuating means for said accumulator wheels normally disconnected therefrom, means for connecting said accumulator wheels and said actuating means preliminary to digitation and for disengaging the same subsequent thereto, counter wheels, crawl type tens-transfer devices between said counter wheels, and actuating means for said counter wheels: the combination which comprises means including gears positionable to operatively connect said counter wheels to said accumulator wheels, means for simultaneously positioning said gears in connecting relationship and for rendering said counter actuating means inoperative to move said counter wheels, and means for holding said positionable gears in such connecting relationship throughout the period of engagement of said accumulator wheels by said accumulator actuating means.

10. In a calculating machine having accumu lator wheels, normally disconnected actuators for said accumulator wheels, engaging means operable to operatively connect said accumulator wheels with said actuators during digitation, counter wheels, and an actuator for said counter wheels: the combination which comprises a normally disengaged connecting means for driving said counter wheels from said accumulator wheels, means for rendering said counter actuator inoperative to move said counter wheels, a manually operated control means including means operative to operate said means for rendering said counter actuator inoperative, and means jointly operable by said manually operated control means and by said engaging means for positioning said connecting means into connecting relationship with said accumulator wheels and said counter wheels.

11. In a calculating machine having accumulator wheels, normally disconnected actuators for said accumulator wheels, engaging means operable to operatively connect said accumulator wheels with said actuators during digitation, counter wheels, an actuator for said counter wheels, crawl tens-transfer devices between the various orders of said accumulator wheels, crawl tens-transfer devices between the various orders of said counter wheels, and aligning means for said accumulator wheels and said counter wheels to eliminate partial transfers: the combination which comprises a normally disengaged gearing for driving said counter wheels from said accumulator wheels, means operable by said engaging means for positioning said gearing into operative relationship with said accumulator wheels and said counter wheels if said gearing is in a preselected position; means for rendering said counter actuator inoperative to move said counter wheels, and a manually positioned control means operative to move said gearing into the preselected position and to operate said means for rendering said counter actuator inoperative.

12. In a calculating machine comprising accumulator wheels connected by entrained gearing and mechanism including cams operable by said accumulator wheels for controlling the alignment of said numeral wheels, counter wheels connected by entrained gearing and mechanism including cams operable by said counter wheels for controlling the alignment of said counter wheels, actuating means for said accumulator wheels, means for engaging said accumulator wheels with said actuating means preliminary to digitation and for disengaging the same subsequent thereto, and a counting means for said counter wheels; the improvement which comprises means including interposable gears positionable to connect said counter wheels with said accumulator wheels during engagement of said accumulator wheels and said actuating means, and control means for positioning said interposable gears in connecting position and for rendering said counting means inoperative to move said counter wheels.

GRANT C. ELLERBECK.

References Cited in the file of this patent UNITED STATES PATENTS 0 Number Name Date 705,838 Hamann July 29, 1902 1,016,276 Kilpatrick Feb. 6, 1912 2,052,604 Christian et a1. Sept. 1, 1936 2,389,182 Chase Nov. 20, 1945 2,556,762 Lydfors June 12, 1951 

